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中文摘要：
利用2008年3月和6月衢山岛海域渔业资源调查资料,研究衢山岛海域甲壳动物十足目（Decapoda）和口足目（Hoplocarida）中虾类的资源密度、种类组成和物种多样性等分布,分析主要优势种密度对其总资源密度的影响。结果表明,两个航次拖网调查样品中,共鉴定十足目18种,口足目1种。3月日本鼓虾（Alpheus japonicus）、葛氏长臂虾（Palaemon gravieri）和安氏白虾（Exopalaemon annandalei）是衢山岛海域的主要优势种,6月的日本鼓虾无论在重量还是尾数上都是主要优势种。3月和6月两类优势甲壳动物平均重量密度分别为840.65 kg/km2和923.52kg/km2,尾数密度分别为797.34×103 ind/km2和647.32×103ind/km2。重量密度和尾数密度分布趋势一致,呈现调查海域南部水域高于北部的分布趋势。依据贡献率β值,衢山岛海域总密度与主要优势种密度变化有关。
英文摘要：
Based on the data taken from two fishery resource surveys near the sea area of Qushan Island in March and June 2008,this study investigated distributions of Hoplocarida and Decapoda shrimp（simply called ＂shrimp＂） resource density,species composition,richness and diversity（H＇）;analyzed the contribution of the dominant species to total shrimp density.Results showed that 18 Decapoda and 1 Hoplocarida species were identified.Among them Alpheus japonicus,Palaemon gravieri and Exopalaemon annandalei were dominant species in March,while Alpheus japonicus was the dominant species in June.Weight density was 840.65 kg/km2 and individual density was 797.34×103 ind/km2 in March,and 923.52 kg/km2 and 647.32×103 ind/km2 in June respectively.Both weight and individual distribution showed the same tendency that the densities in the south area were higher than those in the north area.Based on theβ value,we come to the conclusion that the change of shrimp density was closely related with the change of the main dominant species density.
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